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Development of a new cleaner production process for cassava ethanol

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Chinese Journal of Chemical Engineering 2017年第4期25卷 493-498页

作者： Ke Wang Xinchao Yang xidong ren Jianhua Zhang Zhonggui Mao The Key Laboratory of Industrial Biotechnology Ministry of EducationSchool ofBiotechnologyJiangnan UniversityWuxi 214122China

A new cleaner production process for cassava ethanol has been developed, in which the thin stillage by-product was treated initially by anaerobic digestion, and the digestate further processed by hydrogen-form cation exchange resin before being recycled as process water to make mash for the next ethanol fermentation *** wastewater was eliminated and freshwater and energy consumption was significantly reduced. To evaluate the new process, ten consecutive batches of ethanol fermentation and anaerobic digestion at lab scale were carried out. Average ethanol production in the recycling batches was 11.43%(v/v) which was similar to the first batch, where deionized(DI) water was used as process water. The chemical oxygen demand(COD) removal rate reached 98% and the methane yield was 322 ml per gram of COD removed, suggesting an efficient and stable operation of the anaerobic digestion. In conclusion, the application of the new process can contribute to sustainable development of the cassava ethanol industry.

关键词： anaerobic fermentation digestion resin ethanol batch eliminated processed wastewater removed

Reply to Comment on“Chemical vapor deposition synthesis and Raman scattering investigation of quasi-one-dimensional ZrS_(3) nanoflakes”

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Nano Research 2024年第9期17卷 8649-8650页

作者： Yang Chen Yuanyuan Jin Junqiang Yang Yizhang ren Zhuojun Duan Xiao Liu Jian Sun Song Liu Xukun Zhu xidong Duan Institute of Chemical Biology and Nanomedicine(ICBN) College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China Hunan Key Laboratory of Two-Dimensional Materials and State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China School of Physics and Electronics Central South UniversityChangsha 410083China

1 Introduction Thanks very much for *** taking time to comment on our recent paper regarding“Chemical vapor deposition synthesis and Raman scattering investigation of quasi-one-dimensional ZrS_(3) nanoflakes”.We summarize the suggestions of *** as made in the comment[1].First,*** suggested that there are just three peaks of two S 2p doublets in Fig.2(b)in the original paper[1],which is inconsistent to the four peaks of previous reports[2-4].Second,*** mentioned that the ratio of two S 2p doublets is helpful to identify the sulfur vacancies,which have a great impact on the n-type semiconducting nature of ZrS_(3).Third,*** mentioned that Zr 3d peak appearing at 184.7 eV is wider than previous reports[2,4],which may be accounted by the appearance of ZrS_(2)O,and Zr remains in the tetravalent state.

关键词： state. synthesis quasi

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Z油田大斜度压裂井产能数值模拟研究

石油化工高等学校学报 2018年第2期31卷 76-81页

作者：任喜东李咏洲大庆油田有限责任公司第二采油厂黑龙江大庆163414 中石油西南油气田分公司川东北气矿四川达州635000

针对Z油田具有代表性的7口大斜度压裂井建立了单井砂岩模型、孔隙度模型、渗透率模型,形成了Z油田天然裂缝发育储层大斜度压裂井产能数值模拟方法,数值模拟给出了不同层段(S1段、S3段和D2段、D3段)、不同井斜角(60°、75°)、不同裂缝... 详细信息

针对Z油田具有代表性的7口大斜度压裂井建立了单井砂岩模型、孔隙度模型、渗透率模型,形成了Z油田天然裂缝发育储层大斜度压裂井产能数值模拟方法,数值模拟给出了不同层段(S1段、S3段和D2段、D3段)、不同井斜角(60°、75°)、不同裂缝参数和生产压差条件下大斜度压裂井产能模拟结果。通过探井试油资料与数值模拟预测结果对比分析可知,该数值模拟方法的计算结果与实际试油结果吻合,从而为Z油田大斜度压裂井产能预测分析提供了科学依据。

关键词：大斜度压裂井产能预测裂缝参数

适应性进化提高淀粉酶产色链霉菌T17自发酸胁迫抗性的生理机制

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食品科学 2020年第12期41卷 106-112页

作者：任喜东于超王晨莹刘新利齐鲁工业大学(山东省科学院)生物基材料与绿色造纸国家重点实验室山东济南250353 齐鲁工业大学(山东省科学院)山东省微生物工程重点实验室山东济南250353 齐鲁工业大学(山东省科学院)食品科学与工程学院山东济南250353

考察ε-聚赖氨酸产生菌淀粉酶产色链霉菌(Streptomyces diastatochromogenes)T17,及其经酸性适应性进化得到的3株进化菌株(*** AE41、*** AE51和*** AE56)应对自发酸胁迫的生理响应。比较2个胁迫时间下原始菌株和进化菌株相关生理指标... 详细信息

考察ε-聚赖氨酸产生菌淀粉酶产色链霉菌(Streptomyces diastatochromogenes)T17,及其经酸性适应性进化得到的3株进化菌株(*** AE41、*** AE51和*** AE56)应对自发酸胁迫的生理响应。比较2个胁迫时间下原始菌株和进化菌株相关生理指标的变化。结果显示,在第0小时(pH 6.5),原始菌株和进化菌株的各生理指标无明显区别;在第48小时(pH 3.2),相较于原始菌株,进化菌株的耐酸能力更强,胞内pH值、ATP含量和H+-ATPase活性均明显提高,胞内天冬氨酸、丙氨酸、谷氨酸、赖氨酸、甘氨酸以及脯氨酸浓度明显增加,细胞膜脂肪酸的不饱和度明显增加从而提高流动性。进化菌株能够实现对自发酸胁迫的制衡。

关键词： ε-聚赖氨酸淀粉酶产色链霉菌T17 酸性适应性进化自发酸胁迫耐酸生理机制

微生物来源谷氨酰胺转氨酶的异源表达、发酵及应用研究进展

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食品科学 2023年第23期44卷 223-230页

作者：闫文慧孙鑫洁袭祥恒王晨莹任喜东齐鲁工业大学(山东省科学院)生物基材料与绿色造纸国家重点实验室山东济南250353 齐鲁工业大学(山东省科学院)山东省微生物工程重点实验室山东济南250353 齐鲁工业大学(山东省科学院)食品科学与工程学院山东济南250353

谷氨酰胺转氨酶(transglutaminase,TG)是一类应用广泛、具有优秀蛋白交联能力的酶。TG普遍存在于动植物和微生物中,微生物来源的TG(microbial TG,mTG)拥有良好的酶学性质,因此广泛应用于工业化生产和应用中。本文阐述了mTG的理化性质和... 详细信息

谷氨酰胺转氨酶(transglutaminase,TG)是一类应用广泛、具有优秀蛋白交联能力的酶。TG普遍存在于动植物和微生物中,微生物来源的TG(microbial TG,mTG)拥有良好的酶学性质,因此广泛应用于工业化生产和应用中。本文阐述了mTG的理化性质和自身的活化机理,以及利用野生菌株和不同的重组基因工程菌株发酵生产mTG的研究成果及进展,同时综述了mTG在多种工业生产中的应用及潜力,以期为mTG在工业生产和应用方面的研究提供参考和新的思路。

关键词：谷氨酰胺转氨酶活化机理发酵异源表达应用

基于pH调节和有机氮源流加调控补料分批发酵过程提高ε-聚赖氨酸产量

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生物工程学报 2015年第5期31卷 752-756页

作者：孙启星陈旭升任喜东郑根成毛忠贵江南大学生物工程学院工业生物教育部重点实验室江苏无锡214122

为了解决ε-聚赖氨酸(ε-PL)补料分批发酵过程中后期ε-PL产率下降的问题,提出了在补料阶段利用调节p H值和流加有机氮源(酵母粉)两种手段来提高ε-PL产率。利用上述两种策略,实现ε-PL平均产率分别达到4.62 g/(L·d)和5.16 g/(L·d),... 详细信息

为了解决ε-聚赖氨酸(ε-PL)补料分批发酵过程中后期ε-PL产率下降的问题,提出了在补料阶段利用调节p H值和流加有机氮源(酵母粉)两种手段来提高ε-PL产率。利用上述两种策略,实现ε-PL平均产率分别达到4.62 g/(L·d)和5.16 g/(L·d),较未调控补料分批发酵(典型补料分批发酵)分别提高了27.3%和42.15%;同时,实现ε-PL产量分别达到36.95 g/L和41.32 g/L,较未调控补料分批发酵分别提高了27.4%和42.48%。进一步细胞活性染色和关键酶活性分析发现,两种策略均能显著提高细胞活力和关键酶活性。该研究结果表明,在发酵中后期通过调节p H值和流加酵母粉两种措施能够显著增强细胞活性和产生菌代谢能力,从而达到提高ε-PL产率和产量的目的。

关键词： ε-聚赖氨酸细胞活力链霉菌M-Z18 补料分批发酵

基于时序Sentinel-2数据水体动态变化监测——以河南省为例

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自然资源遥感 2024年第2期36卷 268-278页

作者：魏鑫任雨陈曦东胡青峰刘辉周婧宋冬伟张培佩黄志全华北水利水电大学测绘与地理信息学院郑州450045 西北师范大学地理与环境科学学院兰州730070 河南有色金属地质矿产局第七地质大队郑州450045 河南省测绘院郑州450045 洛阳理工学院洛阳471023

内陆水体作为生态系统中不可替代的资源,在气候变化、区域水循环等诸多方面起着至关重要的作用。科学准确地监测水体分布与动态变化,对维持生态系统平衡、人类可持续发展、水旱灾害预警等方面具有重要意义。然而,目前针对内陆水体的研... 详细信息

内陆水体作为生态系统中不可替代的资源,在气候变化、区域水循环等诸多方面起着至关重要的作用。科学准确地监测水体分布与动态变化,对维持生态系统平衡、人类可持续发展、水旱灾害预警等方面具有重要意义。然而,目前针对内陆水体的研究多以静态监测为主,对于高分辨率水体动态变化监测研究仍较为匮乏。因此,研究依托Google Earth Engine(GEE)云计算平台,以2020年的Sentinel-2地表反射率数据为数据源,进行10 m空间分辨率水体动态变化监测研究。首先,研究基于典型地表覆盖类型在Sentinel-2不同波段及水体指数中的表现特征,选取最优的水体监测特征;其次,研究结合先验水体产品提出一种水体训练数据集的自动提取方法,来获取高置信度水体训练样本;再次,依据D-S(Dempster-Shafer)证据理论模型将光谱角距离与欧式距离相融合,并结合所提取的最优监测特征提出一种SA-ED(spectral angle-Euclidean distance)水体动态监测模型;最后,以河南省为例对算法的稳定性进行测试。结果表明,本研究所提SA-ED模型能够有效对水体的动态变化进行监测,基于SA-ED算法对河南省内水体的整体监测精度达到97.03%,对于稳定性水体用户精度和生产者精度分别为95.85%和95.17%,季节性水体的用户精度和生产者精度分别为96.21%和93.82%。研究成果可为精细分辨率的水体动态变化监测提供新的借鉴与思路。

关键词：内陆水体水体分布动态监测 Google Earth Engine Sentinel-2

Chemical vapor deposition synthesis and Raman scattering investigation of quasi-one-dimensional ZrS_(3)nanoflakes

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Nano Research 2023年第7期16卷 10567-10572页

Quasi-one-dimensional ZrS_(3)nanoflakes attract intense interest attributed to their superior electrical and optical anisotropy,stemming from the low symmetry in the crystal ***,the conventional chemical vapor transport method for synthesizing bulk ZrS_(3)is limited by morphology and size *** is highly desirable to propose a facile way to precisely synthesize ZrS_(3)*** this work,the chemical vapor deposition method is proposed as a feasible way to synthesize ZrS_(3)*** effects of various substrates and temperatures on ZrS_(3)synthesis have been *** the as-grown ZrS_(3),good crystallinity is confirmed with X-ray diffraction and transmission electron *** structure and interlayer coupling are investigated with Raman scattering *** strong in-plane anisotropy and interlayer coupling of the ZrS_(3)nanoflakes are illustrated with angle-resolved Raman spectroscopy and temperature-dependent Raman characterization,*** study demonstrates a feasible way for the synthesis of transition metal trisulfides,which may shed new light on the research of other two-dimensional anisotropic transition metal materials.

关键词： quasi-one-dimensional ZrS_(3)nanoflakes chemical vapor deposition method in-plane anisotropy interlayer coupling

Two-dimensional materials for future information technology: status and prospects

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Science China(Information Sciences) 2024年第6期67卷 1-147页

作者： Hao QIU Zhihao YU Tiange ZHAO Qi ZHANG Mingsheng XU Peifeng LI Taotao LI Wenzhong BAO Yang CHAI Shula CHEN Yiqi CHEN Hui-Ming CHENG Daoxin DAI Zengfeng DI Zhuo DONG xidong DUAN Yuhan FENG Yu FU Jingshu GUO Pengwen GUO Yue HAO Jun HE Xiao HE Jingyi HU Weida HU Zehua HU Xinyue HUANG Ziyang HUANG Ali IMRAN Ziqiang KONG Jia LI Qian LI Weisheng LI Lei LIAO Bilu LIU Can LIU Chunsen LIU Guanyu LIU Kaihui LIU Liwei LIU Sheng LIU Yuan LIU Donglin LU Likuan MA Feng MIAO Zhenhua NI Jing NING Anlian PAN Tian-Ling ren Haowen SHU Litao SUN Yue SUN Quanyang TAO Zi-Ao TIAN Dong WANG Hao WANG Haomin WANG Jialong WANG Junyong WANG Wenhui WANG Xingjun WANG Yeliang WANG Yuwei WANG Zhenyu WANG Yao WE... School of Electronic Science and Engineering Nanjing University School of Integrated Circuits Interdisciplinary Research Center for Future Intelligent Chips (Chip-X)Nanjing University School of Integrated Circuit Science and Engineering Nanjing University of Posts and Telecommunications State Key Laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences School of Physics and Key Lab of Quantum Materials and Devices of the Ministry of Education School of Electronic Science & EngineeringSoutheast University College of Integrated Circuits State Key Laboratory of Silicon and Advanced Semiconductor MaterialsZhejiang University Suzhou Laboratory State Key Laboratory of Integrated Chips and Systems School of MicroelectronicsFudan University Shaoxin Laboratory Department of Applied Physics The Hong Kong Polytechnic University Key Laboratory for Micro-Nano Physics and Technology of Hunan Province College of Materials Science and EngineeringHunan University College of Integrated Circuits Zhejiang University Shenzhen Geim Graphene Center Shenzhen Key Laboratory of Layered Materials for Value-Added ApplicationsTsinghua-Berkeley Shenzhen Institute & Institute of Materials ResearchTsinghua Shenzhen International Graduate SchoolTsinghua University State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZijingang CampusZhejiang University National Key Laboratory of Materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences CAS Key Laboratory of Nanophotonic Materials and Devices & Key Laboratory of Nanodevices and Applications i-LabSuzhou Institute of Nano-Tech and Nano-Bionics (SINANO)Chinese Academy of Sciences College of Chemistry and Chemical Engineering Hunan University Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education) Department of PhysicsRenmin University of China School

Over the past 70 years, the semiconductor industry has undergone transformative changes,largely driven by the miniaturization of devices and the integration of innovative structures and materials. Two-dimensional(2D) materials like transition metal dichalcogenides(TMDs) and graphene are pivotal in overcoming the limitations of silicon-based technologies, offering innovative approaches in transistor design and functionality, enabling atomic-thin channel transistors and monolithic 3D integration. We review the important progress in the application of 2D materials in future information technology, focusing in particular on microelectronics and optoelectronics. We comprehensively summarize the key advancements across material production, characterization metrology, electronic devices, optoelectronic devices, and heterogeneous integration on silicon. A strategic roadmap and key challenges for the transition of 2D materials from basic research to industrial development are outlined. To facilitate such a transition, key technologies and tools dedicated to 2D materials must be developed to meet industrial standards, and the employment of AI in material growth, characterizations, and circuit design will be essential. It is time for academia to actively engage with industry to drive the next 10 years of 2D material research.

关键词： two-dimensional (2D) materials information technology production technology standardization of characterization microelectronicdevices optoelectronic devices multi-functional integration